Measurements

Carbon Dioxide CO2

Aeroqual designs and delivers monitors that measure carbon dioxide (CO2). Choose from our perimeter or handheld air monitoring range.

Here we cover CO2 measurement principles and specifications.

Overview of carbon dioxide

Carbon dioxide (CO2) is a significant greenhouse gas that is monitored globally due to its impact on the earth’s climate. Anthropogenic sources of CO2 are typically combustion processes, including burning fossil fuels for energy production, industrial activities, and transportation.

Increasing concentrations of atmospheric CO2 have been shown to have profound implications for the earth's climate, leading to rising temperatures, altered weather patterns, and long-term environmental changes.

Aeroqual

Perimeter air quality monitor

The CO2 analyzer module features in our perimeter air quality monitor: AQM 65 Monitoring Station.

Measurement principle

The carbon dioxide analyzer module is a continuous sensor-based analyzer used to measure CO2 in ambient air. It is primarily used to quantify greenhouse gas emissions. The CO2 analyzer module incorporates near dispersive infrared receptor (NDIR) technology. Carbon dioxide will absorb infrared light of a specific wavelength. This absorbance is proportional to the concentration of CO2 in the air. NDIR sensors are highly selective to CO2 and therefore well suited to indicative ambient monitoring of this important greenhouse gas.

Module specifications

The CO2 module performance specifications are given in the table below.

CO2 Analyzer Module

Range (ppm)

0 - 2000

Display Resolution (ppm)

1

Noise: Zero (ppm); Span (% of reading)

5; 1%

Limit of Detection (ppm)

10

Precision

3% of reading or 10 ppm

Linearity (% of FS)

2%

24 hr Drift: Zero (ppm); Span (% of FS)

1; 0.6%

Aeroqual

Handheld air monitors and fixed indoor monitors

The CO2 sensor head features in our handheld air quality monitors: Ranger and S Series, and indoor fixed monitor range Series 900.

Carbon dioxide sensor head measurement principle

The carbon dioxide sensor head uses near dispersive infrared receptor (NDIR) technology. CO2 will absorb infrared light of a specific wavelength. This absorbance is proportional to the concentration of CO2 in the air. NDIR sensors are highly selective to CO2 and therefore well suited to indicative ambient monitoring of this important greenhouse gas.

Carbon dioxide sensor head specifications

The table below contains the carbon dioxide sensor head specifications. These can be used on our Ranger, S Series and Series 900 products. The 0-5000 ppm is designed for monitoring indoor air quality and industrial health and safety, while the 0-2000 ppm range can do that plus outdoor environmental monitoring.

Sensor code

CD

CE

Sensor type

NDIR

NDIR

Range (ppm)

0-2000

0-5000

Detection limit (ppm)

10

20

Accuracy of factory calibration

<±10 ppm + 5%

<±20 ppm + 5%

Display resolution (ppm)

1

1

Response time (seconds)

120

120

Products that measure carbon dioxide

The following products measure carbon dioxide, as well as particulate matter and gaseous pollutants in real-time.

Inquire about our carbon dioxide products

Our CO2 advanced monitoring systems deliver hyper-local data and real-time alerts, giving you actionable data to make the decisions that matter.